/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */
package org.openecomp.core.utilities.applicationconfig.dao.impl;

import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.Row;
import com.datastax.driver.mapping.Mapper;
import com.datastax.driver.mapping.Result;
import com.datastax.driver.mapping.annotations.Accessor;
import com.datastax.driver.mapping.annotations.Query;
import java.util.Collection;
import java.util.Objects;
import org.openecomp.core.dao.impl.CassandraBaseDao;
import org.openecomp.core.nosqldb.api.NoSqlDb;
import org.openecomp.core.nosqldb.factory.NoSqlDbFactory;
import org.openecomp.core.utilities.applicationconfig.dao.ApplicationConfigDao;
import org.openecomp.core.utilities.applicationconfig.dao.type.ApplicationConfigEntity;
import org.openecomp.core.utilities.applicationconfig.type.ConfigurationData;

public class ApplicationConfigDaoCassandraImpl extends CassandraBaseDao<ApplicationConfigEntity> implements ApplicationConfigDao {

    private static final NoSqlDb noSqlDb = NoSqlDbFactory.getInstance().createInterface();
    private static final Mapper<ApplicationConfigEntity> mapper = noSqlDb.getMappingManager().mapper(ApplicationConfigEntity.class);
    private static final ApplicationConfigAccessor accessor = noSqlDb.getMappingManager().createAccessor(ApplicationConfigAccessor.class);

    @Override
    protected Mapper<ApplicationConfigEntity> getMapper() {
        return mapper;
    }

    @Override
    protected Object[] getKeys(ApplicationConfigEntity entity) {
        return new Object[]{entity.getNamespace(), entity.getKey(), entity.getValue()};
    }

    @Override
    public void create(ApplicationConfigEntity entity) {
        accessor.updateApplicationConfigData(entity.getNamespace(), entity.getKey(), entity.getValue());
    }

    @Override
    public void update(ApplicationConfigEntity entity) {
        accessor.updateApplicationConfigData(entity.getNamespace(), entity.getKey(), entity.getValue());
    }

    @Override
    public ApplicationConfigEntity get(ApplicationConfigEntity entity) {
        return accessor.get(entity.getNamespace(), entity.getKey());
    }

    @Override
    public Collection<ApplicationConfigEntity> list(ApplicationConfigEntity entity) {
        return accessor.list(entity.getNamespace()).all();
    }

    @Override
    public long getValueTimestamp(String namespace, String key) {
        ResultSet resultSet = accessor.getValueAndTimestampOfConfigurationValue(namespace, key);
        return resultSet.one().getLong("writetime(value)");
    }

    @Override
    public ConfigurationData getConfigurationData(String namespace, String key) {
        //String value = accessor.getValue(namespace, key).one().getString("value");
        ResultSet resultSet = accessor.getValueAndTimestampOfConfigurationValue(namespace, key);
        Row one = resultSet.one();
        if (Objects.nonNull(one)) {
            return new ConfigurationData(one.getString("value"), one.getLong("writetime(value)"));
        }
        return null;
    }

    @Accessor
    interface ApplicationConfigAccessor {

        @Query("select namespace, key, value from application_config where namespace=?")
        Result<ApplicationConfigEntity> list(String namespace);

        @Query("insert into application_config (namespace, key, value) values (?,?,?)")
        ResultSet updateApplicationConfigData(String namespace, String key, String value);

        @Query("select namespace, key, value from application_config where namespace=? and key=?")
        ApplicationConfigEntity get(String namespace, String key);

        @Query("select value, writetime(value) from application_config where namespace=? and key=?")
        ResultSet getValueAndTimestampOfConfigurationValue(String namespace, String key);
    }
}
